Stable, dry, and readily-soluble vat preparations and process of making same



s rares rarearorriee.

KARL THIESS, 0F SINDY.INGIFINv NEAR. HOCHST-ON-THE-MAIN, AND FRITZ MAENN.

' CHEN, ADOLF STEINDORFF. AND FRANZ GILOY. OF HOCHST-ON-THE-MAIN, GER- MANY, ASSIGNORS TO FARBWERKE VORM. MEISTER LUCIUS & BRUNING, 0F HOCHST-ON-THE-MAIN. GERMANY, A CORPORATION OF GERMANY.

STABLE, DRY, AND BEADILY-SOLUBLE VAT PREPARATIONS AND IEAKING SAIME.

rnoenss or 0 Drawing. I

To an whom izimuy concern:

lie it known that we, KARI. Tnmss, Fnrrz ll'lAnNNoHnN, Anonr Srmnnourr, and Fnaxz (may, citizens of Germany, residing at Sindling'en, near Hochst-on-the-Main, and Hochst-on-the-Main, Germany, have invented certain new and useful Improvements in Stable, Dry, and Readily-Soluble Vat Preparations and Processes of Making Same, of which the fOllOWing is a specifi 'ation,

Processes are known for preparing dry alkali salts of indigo-white in the form oi small loose and frothy, somewhat"vesicular, stable and readily soluble lumps, with or without the addition of agglutinating bodies, such as molasses, sugar or sulphitecellulose pitch. However, when applying these processes to the manufacture of vat preparations from the sulphurized or nonsulphurized quinon-vat dyestuffs dying: wool, the preparations thus obtained have defective qualities. Such quinone-dyestutls are in particular (1) the sulphurized products obtainable either according to U. S. Patent No. 1,128,368 ofl 'elnuary 16, 1915, from halogenized quinones and arylumines or the substitution products (such as chloroor nitro-arylamines) by treatment with sulphur, or from .quinonet-hiosulphonie acids or bodies of similar action and arylaniines. (i) the non-sulpluu'izedproducts such, for

, instance, as the arylid'o-quinones which can be used. as vat ilyestulls see U. S. latemt No. 1,009,981 of November 28, 1911.) .ll( wever, as above mentioned, the vat-prep: rations made from these dyestuffs do not give satisfactory results in practice, as they have not the great solubility and porosity characteristie of the corresponding vat preparation from indigo. Moreover, the aforesaid products canonly be dried with great dilliculty and, when dry, they tend to agglomer ate. Finally the dyestuil" as such sufi'ers when it is evaporated and dried so that it loses in its yield and intensity of colour.

By our present invention the aforesaid disadvantages can be avoided/by adding a larger or smaller proportion an all Kalb salt of indigo-White. If, for instance, 2. mixture of equal parts of a learn-compound of a'brown sulphurized quinone vat-dyestuff obtainable'mfor instance aecording to EX:

Specification of Letters Patent.

Application filed August 23, 1921.

Patented Aug. 22, 1922..

Serial no. 494,714.

airple 1 of U. S. Patent 1,128,368,0f February 16, 1915 and of a leuco-compound of oi indigo, or a corresponding proportion of a mixture containing a smaller or larger amount of an alkali salt of indigo-whiter, is

evaporated, preferably in a vacuum, and inflated according to the said processes, with or without the addition of agglutinating or 'at-pre zarations'which are readily soluble diluting bodies, there are obtained porous and in which no colouring matter has been of the dyestuii' obtained by treating dichloranilido-quinone with sodium sulphide 3600l1ngt0 U. S. Patent No. 1,128,368 of soda lye of 40 Beum speeifio gravity, kilos hylrosulphite, the latter dissolved in 300 in es of Water. The paste or liquid thus ob- Febjuary 16, 1915, with 290 kilO'S of caustic of molasses or 30"kilos of sulphite-' cell ilose "pitch and 39 kilos of commercial t ined is evaporated i a. vacuum to dryness so as to assume a so 1d porousfiorm. The 1 vat-preparation thusobtained is of a loose and frothy, somewhat vesicular-nature and shows a dark lustre.- It is extremely stable and readily soluble in Water yielding a vat ready for use which dyes wool black tints.

2. There is prepared a. paste of about- 20 l per cent strength from the leucoeompound of180 l1l05 of indigo and 180 kilos of the sulphurized quinone vat-dyestull-.obtainable according to ll. 3. Patent No. 1,128,368 of February 16,- 1915. This paste is mixed and stirred with 330 kilos of mLHStiC soda lye of 40 liaum specifie 'ty;, ZSOQlri-los of ater, 40 kilos of mole, b

evaporated torlryne'ss. The obtained is equal to that d on ample 1 as regerds its some;

8, There is preparede paste trem "the lease-compounds of 125 kilos of indigo and 250 kilos of para-paradichlorodiaixilid product in. E ,nd solubility.

and 30 kilos oi" hydrosulphit= powder and the is quinone. This paste is mixed solution of 300 kilos of caustic soda.- of 40 Bauin specific gravity, 60 kilos of molasses (50 per cent strength) and 30 kilos of coin mercial hydrosulphite in 400 kilos of Water and the Whole is evaporated co dryness.

-'ilhe product thus obtained is of a loose and frothy, somewhat vesicular nature and has a dark lustre; it is readily soluble in ater yielding a vatlwhich dyes 'n'ool green and greenishblue tints.

H for the brown dyesbufi in Examples 1 and 2 or for the yellow dyeing para-para dichloro-dianilidoquinone in Example 3 is substituted the yellow dyestufl described in U. S. Patent No. 1,128,368 and No. 1,151,628,

, corresponding vat-preparations are obtained of a solid frothy, somewhat vesicular nature which dye W001 mixed tints.

Having now described our invention,

1. As a new process, the herein described manufacture of stable, dry and readily soluble vaopreparations from quinone vat dyestuffs for W001 and indigo, which cornrises eva oracin a). dr ness an a ueous' mixture of an alkali leuco-salh of the quinone vat dyestufi s and an alkali salt of leuco indigo. v 2. As a new process, the herein described manufacsure of stable, dry and readily soluble vat preparations fromquinone vat dyestuffs for wool andindigo, which comprises evaporating to drynessan aqueous mixtureof an alkali leuco-salt of the quin'one vat dye-studs and an alkali salt of'leu'co indigo and an agglutinaiing or diluting agent,

3. As a new process, the herein described manufacture of stable, dry and readily soluble vanpreparations froinquinone vat dye-- stuffs for wool and indigo, which compi c evaporating in a vacuum to dryness an aqueous mixture of an alkali leucoealt the quinone vat dyestuffs and an alkali salt of leuco indigo.

4. As a new process, the herein described manufacture of stable, dry and readily soluble vat preparaiions from quinone vat dyestuffs for W001 and indigo, which comprises evaporating in a vacuum to dryness an aqueous mixture of an alkali. leuco-salt of the quinone, vat dyestuffs and an alkali salt of leuco indigo and an agglurinating or diluting agent.

5. new products, vat preparations from quinone vat dyestuffs for W001 and in digo, which preparaiions contain an alkali leuco-salt of said quinone v'ah-dyestuffs t0- gether with alkali salt of-f i'eucodndigo and are stable, dry and readily-soluble.

6. new products, vat preparations 'from q'uine-ne vai" dyestuiis for wooland indigo,'wl1ich preparations contain an alkali leuco-sali; of said quinone vat-dyestuiis togethcr with an alkali salt of leuco-indig0 and an aggluiinating or diluting agent, and

which are stable, dry and readily soluble. lln testimony whereof, we aiiix our signatures. 1;

THIESS. FRITZ MAENNOHEN. ADOLF STEINDORLFF.

FRANZ GELOY. 

